While coasting down Collins Avenue in North Miami Beach, it's hard to miss the sweeping, steamship-like entrance to the Eden Roc. The landmark hotel, designed by famed neo-baroque architect Morris Lapidus, has been a playground for the glamorati since opening in 1956. Nat King Cole performed "Unforgettable" in the ballroom; the Rat Pack partied by the pool; Lucille Ball and Desi Arnaz lived in the penthouse while filming episodes of I Love Lucy on the grounds; and the likes of Elizabeth Taylor, Katharine Hepburn, and Olivia de Havilland have all signed the guest registry. It's safe to say that the inaugural ELLE Spa, which opened at Eden Roc in May, is in legendary company.

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The exclamation mark at the end of the hotel's recent $220 million renovation, the sleek 22,000-square-foot spa offers a mood-pleasing mix of ELLE-editor-approved indulgent—and results-driven—treatments for the face and body, including a luminosity-boosting signature facial created by renowned holistic Palm Beach aesthetician Tammy Fender and an age-defying Alpha Beta Peel by Dr. Dennis Gross Skincare. At the ELLE Spa scrub bar, mixologists concoct customized blends of organic oils, biodynamic honey, and sea salts. And the can't-get-it-anywhere-else Red Flower body treatment featuring a healing chlorophyll bath and an antioxidant-packed wrap featuring pomegranate seed and Moroccan rose oil might merit the trip to Miami alone.

Because no getaway is complete without a takeaway, Essie has joined the party to contribute two bespoke nail-varnish hues—the neon pink Eden and can't-miss-it-coral Roc—to be sold exclusively at the ELLE Spa (test-drive the shades with beach-wowing mani-pedis). Another snaggable souvenir is the spa's signature scent—an enlivening blend of lemon verbena, bergamot, mandarin, jasmine, and orange blossom whipped up by Red Flower's Yael Alkalay, and available in aromatherapy oil or candle form—which is capable of transporting you back to Eden Roc with one whiff. Unforgettable, indeed.